S
M
T
W
T
F
S
29
41°
22°
30
41°
23°
1
45°
18°
2
45°
20°
3
39°
21°
4
47°
23°
5
47°
22°
6
46°
21°
7
45°
21°
8
43°
19°
9
44°
18°
10
42°
20°
11
41°
19°
12
42°
19°
13
40°
18°
14
39°
18°
15
37°
17°
16
41°
18°
17
39°
18°
18
40°
20°
19
41°
17°
20
41°
14°
21
38°
17°
22
39°
18°
23
41°
12°
24
40°
4°
25
36°
3°
26
24°
2°
27
25°
4°
28
27°
3°
29
32°
-3°
30
26°
-1°
31
21°
5°
1
25°
7°
2
34°
16°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Spencer
Spencer's December 2026 forecast shows daily high temperatures ranging from 21° to 47°, with overnight lows between -3° and 23°. The average high for December is 38° with an average low of 15°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how December weather will actually feel in Spencer. See also: January | February | March.
